Improve champ priority

Improve champion priority: Right now, if you set a player to practice specific champions, he will play them in every role, even the least favourables (think Janna/Soraka top/jungle, Anivia adc/jungle etc.), effectively making our player's elo and score worse (especially true for supports).

My suggestion is to be able to set 1/2 priority champs for each role so we could still practice champions in multiple roles (increasing champion score) but play something else when off-role.